SQL - 从连接表

我已经填充一个空表（TAB_A）与来自TAB_B随机记录（5％）萃取随机样本，加入了与其它3个表（C1，C2，C3）。SQL - 从连接表

现在，如果我运行下面的查询一切正常：

INSERT INTO TAB_A (field1,field2) 
    SELECT TAB_B.ID_TASS, TAB_B.ID_SEZ 
    FROM (SELECT TAB_B.*, row_number() 
      OVER (ORDER BY dbms_random.VALUE) r 
      FROM TAB_B) 
    WHERE r < (SELECT COUNT(*) FROM TAB_B)*0.05

的问题是，我也需要填写其值在TAB_C3的TAB_A.field3。所以我重写我前面的查询：

INSERT INTO TAB_A (field1,field2,field3) 
    SELECT B.ID_TASS, B.ID_SEZ, C3.Z_ID 
    FROM (SELECT B.*, row_number() 
      OVER (ORDER BY dbms_random.VALUE) r 
      FROM TAB_B B 
       JOIN TAB_C1 C1 on C1.X_ID = B.X_ID 
       JOIN TAB_C2 C2 on C2.Y_ID = C1.Y_ID 
       JOIN TAB_C3 C3 on C3.Z_ID = C2.Z_ID 
      WHERE C3.Z_ID = 9) 
    WHERE r < (SELECT COUNT(*) FROM B)*0.05

但出现错误：ORA-00904： “C3.Z_ID” 无效的标识符。

我想问题可能是在声明中 “SELECT B.ID_TASS，B.ID_SEZ，C3.Z_ID”，我在改变 “SELECT TAB_B.ID_TASS，TAB_B.ID_SEZ，TAB_C3.Z_ID” ....但没有成功：再次发生相同的错误。

顺便说一句，下面的查询工作perfectely：

select count(*) 
    from TAB_B B 
     JOIN TAB_C1 C1 on C1.X_ID = B.X_ID 
     JOIN TAB_C2 C2 on C2.Y_ID = C1.Y_ID 
     JOIN TAB_C3 C3 on C3.Z_ID = C2.Z_ID 
    WHERE C3.Z_ID = 9

任何人可以帮助我吗？

来源

2011-10-19 albus2011

如果你担心性能，你可能要考虑使用示例：http://download.oracle.com/docs/cd/E11882_01/server.112/e26088/statements_10002 .htm＃i2065953 –

尝试

...

SELECT B.ID_TASS，B.ID_SEZ，C3_Z_ID

FROM（SELECT * B.，C3.Z_ID AS C3_Z_ID， ROW_NUMBER（） ...

来源

2011-10-19 10:02:10 schurik

尝试过，但没有成功：相同的错误，但在不同的字段ORA-00904：“B.ID_SEZ”无效标识符。所以我改写：SELECT TASS_ID，SEZ_ID，C3_Z_ID FROM（SELECT B.ID_TASS为TASS_ID，B.SEZIONE_NUM为SEZ_ID，C3.Z_ID AS C3_Z_ID，ROW_NUMBER（）...但出现新的错误：ORA-00942表或视图不存在 – albus2011

@ albus2011：然后尝试改变WHERE r <（SELECT COUNT（*）FROM B）* 0.05 to WHERE r <（SELECT COUNT（*）FROM ** TAB_B **）* 0.05 – schurik

done，但现在错误是ORA-00001唯一约束违反 – albus2011

以下应该工作，虽然我没有测试过

INSERT INTO TAB_A (field1,field2,field3) 
>  SELECT intTab.ID_TASS, intTab.ID_SEZ, intTab.Z_ID 
>  FROM (SELECT B.*, c3.z_id,row_number() 
>    OVER (ORDER BY dbms_random.VALUE) r 
>    FROM TAB_B B 
>     JOIN TAB_C1 C1 on C1.X_ID = B.X_ID 
>     JOIN TAB_C2 C2 on C2.Y_ID = C1.Y_ID 
>     JOIN TAB_C3 C3 on C3.Z_ID = C2.Z_ID 
>    WHERE C3.Z_ID = 9) intTab 
>  WHERE intTab.r < (SELECT COUNT(*) FROM B)*0.05

来源

2011-10-19 11:02:07 josephj1989

'@ josephj1989 - 错误ORA-009 04：“intTab.Z_ID”无效标识符 – albus2011

SQL - 从连接表

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